InChI=1S/C16H20N4O4S/c21-14(17-10-5-7-11(8-6-10)20(23)24)4-2-1-3-13-15-12(9-25-13)18-16(22)19-15/h5-8,12-13,15H,1-4,9H2,(H,17,21)(H2,18,19,22)/t12-,13-,15-/m0/s1